Struct TriggerFirer 

pub struct TriggerFirer;

Helper struct for trigger firing (execution during DML operations)

Implementations

impl TriggerFirer

pub fn find_triggers( db: &Database, table_name: &str, timing: TriggerTiming, event: TriggerEvent, ) -> Vec<TriggerDefinition>

Find triggers for a table and event

Arguments

• db - Database reference
• table_name - Name of the table to find triggers for
• timing - Trigger timing (BEFORE, AFTER, INSTEAD OF)
• event - Trigger event (INSERT, UPDATE, DELETE)

Returns

Vector of trigger definitions matching the criteria, sorted by creation order

pub fn execute_trigger( db: &mut Database, trigger: &TriggerDefinition, old_row: Option<&Row>, new_row: Option<&Row>, ) -> Result<(), ExecutorError>

Execute a single trigger

Arguments

• db - Mutable database reference
• trigger - Trigger definition to execute
• old_row - OLD row for UPDATE/DELETE (None for INSERT)
• new_row - NEW row for INSERT/UPDATE (None for DELETE)

Returns

Ok(()) if trigger executed successfully, Err if execution failed

Notes

• For ROW-level triggers, this is called once per affected row
• For STATEMENT-level triggers, this is called once per statement
• WHEN conditions are evaluated here

pub fn execute_before_triggers( db: &mut Database, table_name: &str, event: TriggerEvent, old_row: Option<&Row>, new_row: Option<&Row>, ) -> Result<(), ExecutorError>

Execute all BEFORE ROW-level triggers for an operation

Arguments

• db - Mutable database reference
• table_name - Name of the table
• event - Trigger event (INSERT, UPDATE, DELETE)
• old_row - OLD row (for UPDATE/DELETE)
• new_row - NEW row (for INSERT/UPDATE)

Returns

Ok(()) if all triggers executed successfully

pub fn execute_before_statement_triggers( db: &mut Database, table_name: &str, event: TriggerEvent, ) -> Result<(), ExecutorError>

Execute all BEFORE STATEMENT-level triggers for an operation

Arguments

• db - Mutable database reference
• table_name - Name of the table
• event - Trigger event (INSERT, UPDATE, DELETE)

Returns

Ok(()) if all triggers executed successfully

pub fn execute_after_triggers( db: &mut Database, table_name: &str, event: TriggerEvent, old_row: Option<&Row>, new_row: Option<&Row>, ) -> Result<(), ExecutorError>

Execute all AFTER ROW-level triggers for an operation

Arguments

• db - Mutable database reference
• table_name - Name of the table
• event - Trigger event (INSERT, UPDATE, DELETE)
• old_row - OLD row (for UPDATE/DELETE)
• new_row - NEW row (for INSERT/UPDATE)

Returns

Ok(()) if all triggers executed successfully

pub fn execute_after_statement_triggers( db: &mut Database, table_name: &str, event: TriggerEvent, ) -> Result<(), ExecutorError>

Execute all AFTER STATEMENT-level triggers for an operation

Arguments

• db - Mutable database reference
• table_name - Name of the table
• event - Trigger event (INSERT, UPDATE, DELETE)

Returns

Ok(()) if all triggers executed successfully